OP the wonderful thing about steam and valve is you never have to ask this question so long as you buy directly from steam and not a 3rd party key seller. You have 2 hours to decide if you want to keep playing up until that mark a full refund is offered… With the updates act 3 runs above 30fps smoothly. It would take upwards of 40-50 hours to get there anyway. 40-50 hours of what I consider some of the best parts of the game. You could also go to ProtonDB, that’s where those of us who are initiated check before we get something we plan on playing on steamdeck.

Idk the status of your warranty, but regardless I’d get with Valve support first. You putting in all that effort for something that may not work and if you do have to send it back to Valve I’m pretty sure it’d have to have the original parts.